Lymow
One Plus
Rated for 1.73 acres and 100% grade — that is 45°, not 100°. On a real lawn, once you allow for borders and travel paths, plan on about 1.38 acres.
Rated area1.73 acres
Max grade100% · 45°
DriveTracked
NavigationRTK + VSLAM + AI vision
Runtime180 min
Per charge0.5 ac
Price$2,999
Sold viaOnline retail
What it handles
Tracks spread the load and hold ground that wheels give up on. That puts it in the small group that can work genuinely steep ground.
Navigation includes vision or LiDAR, so it keeps working under tree cover where satellite-only machines lose their fix.
Cross-shopped with
Rated for a similar area, at the same grade or less.
Segway Navimow X4501.5 ac · 84% · 4WD
Mammotion LUBA 3 AWD 50001.25 ac · 80% · AWD
Mammotion LUBA 3 AWD 5000H1.25 ac · 80% · AWD
Mammotion LUBA 2 AWD1.25 ac · 80% · AWD
How confident we are
Cross-checked against the manufacturer and at least one other source.
Steepest consumer rating found: 45 deg = 100% grade. 1.73 ac/day needs the 10A charger; 0.5 ac per charge. One review lists 15 ac 'working area' - not corroborated, treated as max mappable, not capacity.